冒顶片帮事故是地下矿山危害最为严重的事故，矿山地压管理是地下开采矿山安全管理的重要任务。
Roof fall accident is one kind of dangerous accidents happened at underground mines and underground pressure management is the main task of mining safety management.
矿床地下开采时，在没有其他安全措施的情况下，不得不采用预留安全矿柱的方法，以保护地面建筑物、构筑物和主要井巷免受因地下采矿而引起的破坏。
Without other safety measures, some safety ore pillars have to be reserved to prevent the ground buildings and constructs and the main shafts from being damaged during underground mining.
露天转地下开采矿山地下首采中段安全顶住厚度确定是矿山的关键技术问题，采用MSC。
The determination of safe pillar's thickness in the middle section of the first mining for transferring to underground mining from open pit is the key technical issue for mine. With MSC.
露天转地下开采矿山地下首采中段安全顶住厚度确定是矿山的关键技术问题，采用MSC。
The determination of safe pillar's thickness in the middle section of the first mining for transferring to underground mining from open pit is the key technical issue for mine. With MSC.
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